Moculus is a three-dimensional (3D) virtual reality (VR) system for mice that enables neuroscience advancement that struggles to evolve under regular laboratory conditions. While conventional two-dimensional testing may have a lag time of several days, 3D VR can assess mice's visual cognition up to 300 times faster, in approximately 40 minutes.
The Moculus technology was developed in partnership with Femtonics Ltd and PhenoSys to better understand human visual processing, learning, and memory formation. Moculus is a recognized specialized Virtual Reality (VR) headset, often referred to as “mouse goggles”.
Moculus is a head-mounted virtual reality platform for mice that promotes a full immersion experience. The controllable environment has 3D corridors and objects, merged with a 3D biomedical imaging technique of high-contrast light with high-resolution ultrasound (interactions between sound and light waves).
The system allows for natural mouse behaviors, such as navigating a 3D maze or fleeing from an imaginary predator. The mouse VR uses treadmill integration (e.g., a foam ball). As the mouse runs on the ball, sensors feed this information directly to the computer, which updates the 3D animations to match the visual output of the mouse’s physical movements.
Three-dimensional mouse VR has real-life applications in the future of healthcare, such as developing VR-based rehabilitation services and other injury and disease treatments. The technology is delivered in a controlled, immersive environment so that scientists can effectively study brain function, behavior, and treatment efficacy.
Moculus behavioral technology enables researchers to investigate multiple brain response systems, including hippocampal development (memory), decision-making processes, pharmacology (elevated-zero maze), automated behaviors, and panic stimuli.
The 3D simulation has a 130-degree field of view from each of the mouse’s eyes. This is comparable to a human’s 160-degree visual field. The mouse’s wide field of view completely excludes the physical laboratory environment. This controlled environment secures a convincing 3D illusion that elicits natural, untrained behaviors.
This 3D mechanism allows neuroscientists to monitor the mouse's brain neural activity, via imaging, while the animal is behaving naturally. This neural information is challenging to measure in a real-world scenario.
The softwired 3D simulation enables rapid adaptation, a capability noticeably absent from traditional, screen-based VR systems. This means that mice learn to navigate virtual spaces much faster. Three-dimensional VR systems accommodate natural responses and a true-to-life experience. Unlike screen-based systems, mouse goggles wrap around the animal’s head, providing a comprehensive and realistic panoramic view.
Moculus findings are being applied to the field of Traumatic Brain Injury (TBI) and neurodegenerative diseases. Mouse-based VR research is providing a roadmap to understanding how mammalian brains respond to injury. This is achieved by observing single-nerve-cell activity as mice navigate accurate virtual environments.
Virtual Reality mouse research helps to identify how the human brain can recover motor function, spatial memory, and visual perception after injury or disease. This is achieved by:
Mouse VR headsets guide neuroscientists to map how neural circuits encode information during movement. These maps help to identify which specific pathways are disrupted after injury, guiding directed human therapies for memory loss. Neural pathways in the brain govern not only memory, but perception, motor control, and emotions.
The 2024 journal article, “Brain Neuroplasticity Leveraging Virtual Reality and Brain–Computer Interface Technologies,” shows that repeated interaction with virtual environments can stimulate and strengthen synaptic plasticity. Synaptic plasticity relates to the connections between neural circuits that aid in patient recovery. This synaptic strengthening is thoughtfully applied in human rehabilitation to remodel damaged areas in the brain, particularly for regaining motor control in the upper body after TBI or a stroke.
Research specific to Alzheimer's disease has shown that increasing brain blood flow improves short-term memory. Mouse 3D VR models can be used to test treatments that increase cerebral blood circulation. These treatments, whether pharmacological or lifestyle-based, can be applied in human recovery and disease management. Adequate brain blood flow is crucial for the recovery of TBI.
To assist in this work, nurses can develop specialized expertise to be applied to research and leadership in transforming brain injury rehabilitation. This can be realized through completing online PhD nursing studies from anywhere in the world. This level of education will develop the necessary skills to drive new models of rehabilitation, influence policy, and advance intervention analysis.
Mouse 3D VR technology will continue to evolve. Researchers might look towards developing multisensory mouse 3D VR technology, integrating odor, sound, and advanced physical interfaces that replicate real-world scenarios. Wireless goggles would enable simulations to better capture the mouse’s natural movements in response to 3D stimuli.
Cornell University has developed miniature mouse goggles for Alzheimer’s disease research, using affordable, off-the-shelf components- like smartwatch displays. This will ensure that the technology is both accessible and replicable. These lightweight models better capture the mouse’s natural movement within the simulated environment.
Other than strokes, TBI, and Alzheimer's disease, mouse 3D VR technology can be used for other medical conditions, such as Parkinson’s disease to study cognitive decline, multiple sclerosis to restore physical gait mobility, visual impairment, spinal cord injury, and autism to map hippocampus neural connectivity.
While mouse findings provide the understanding, human clinical application focuses on assessment and rehabilitation methodologies. VR-based neuropsychological tests are highly tuned to detecting subtle deficits in TBI. Also, patients can use 3D VR technology to participate in “real-life” scenarios that are physically safer and offer enhanced stimulation that traditional repetitive exercises may not provide.
